Review on SKF Bearing Precision Clearance Capacity by John Stowers

The box shows part number SKF 6203 2RSJEM but the inside shows part number SKF 6203-2RSH/C3GJN which is a lower quality bearing. Look at the technical data - the SKF 6203-2RSH/C3GJN is only rated for 12000 rpm and has no accuracy class ABEC 3 (ISO class 6). Open the box and look at the side of the bearing with a magnifying glass to see the model number stamped on the side.